forms - form_tag cannot align button and input box - rails 4 bootstrap -

forms - form_tag cannot align button and input box - rails 4 bootstrap -

i've been trying align button , form input tag nil appears working, if utilize normal html form bootstrap.

<div class="input-group"> <input type="text" class="form-control"> <span class="input-group-btn"> <button class="btn btn-primary" type="button">go!</button> </span> </div>

i aligned input box , button, when utilize form_tag helper next in erb;

<%= form_tag search_nut_databases_path, :class => "form-inline", method: :get %> <div class="input-group"> <%= text_field_tag :search, params[:search], class: "form-control", :placeholder => "search database" %> <span class="input-group-btn"> <%= submit_tag 'submit', class: "btn btn-primary" %> </span> </div> <% end %>

i misaligned box, i've checked css , nil should affecting it

thanks

enclosed code form grouping class.. following

<div class="form-group"> <div class="input-group"> <input type="text" class="form-control"> <span class="input-group-btn"> <button class="btn btn-primary" type="button">go!</button> </span> </div> </div>

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